/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.cypher.internal.runtime

object MutableMaps {

  def create[KEY, VALUE](size: Int): collection.mutable.Map[KEY, VALUE] =
    new collection.mutable.OpenHashMap[KEY, VALUE](if (size < 16) 16 else size)

  def empty[KEY, VALUE]: collection.mutable.Map[KEY, VALUE] = create(16)

  def create[KEY, VALUE](input: scala.collection.Map[KEY, VALUE]): collection.mutable.Map[KEY, VALUE] =
    create(input.size) ++= input

  def create[KEY, VALUE](input: (KEY, VALUE)*): collection.mutable.Map[KEY, VALUE] = {
    create(input.size) ++= input
  }
}
